Internal-combustion engine



July 10,1923. 1.461.495

A. L POWELL INTERNAL COMBUSTION ENGINE Original Filed Feb. 2, 192.1

Patented July 10, 1923.

um'rssrrss nemes- A'rur 1 ALVAII L. POWELL, F MILES CITY, MONTANA, ASSIGNOR TO 'THE A. L. POWELL POWER (10., INC., OF MILESOITY, MONTANA, A BODY CORPORATE.

INTERNAL-COMBUSTION ENGINE.

Application filed February 2, 1921, Serial No.- 441,967. Renewed Decemberzz, 1922;

To all whom it may concern s ,Be it known that ALvAi-i L. PownLL, a citizen. of the United States, residlng at Miles City, in the county of Custer and State of Montana, has invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specification.

My invention relates to improvements in internal combustion engines in which I se cure ignition by novel means thereby sim plifyingthe operation of suc engines and making them self-contained. Heretofore,

- ignition has been obtained by theme of an.

electric spark, primary or secondary; a flame, a hot surface, or a glowing element such as'a prepared button of carbon, but in the method I employ direct mechanical means are used, the igniting agent being air,- compressed to a sufficient degree to cause combustion when brought in contact with a volume of hydrocarbon fuel. In the annexed drawings I. showa form of my invention, in which 7 F g. 1 is a vertical section through an engine'equipped with my improvement. p Fig. 2 shows positions of operating cams to. agree with F ig.s1-

Fig. 8 is a partial section of my improvement, the cylinder being shown'at right angles to the position given in Fig. 1.

Fig. 4c is a view of a similar cam 'movement, to agree with Fig. 3.

In Fig. 1, a cylinder A is attached to a second cylinder A by any conventional means. The division of the two parts is indicated by hatchings. In cylinder A is a piston A connected to a sliding sleeve A. The sleeve passes through a boss, A and carries, at one end, a gland, A in which,

Through the A is operable by a cam shown in different positions in Figs. 2 and 4. Cylinder A isdlvided from A by a partition wall, or head,

A that may be integral with said cylinder,

or be made separately. In Fig. 1 I show it integral.

In the head A is a cavity A in the upper part of whichis a valve seat, B. In the lower part of A, and in the same vertical plane as B there is a second valve seat, B An inspection of the drawing will disclose vengagementwith one of theseating surfaces at alternate times, except as to be described later in this specification. Ordinarily, when the upper larger diameter valve surface is in contact with B,.the lower and smaller surface is not in contact with 13 andviceversa. In the head A there is also located a checllrgyalve, B, held in position by a guide rim), A fshown at B 1, this valve communicates with the atmosphere, while'the valve seat itself communicates with interior of cylinder A. In the same figure (1), :a sec ond member, 0, is shown. This is similar in all respects to that just described. means of a. crosshead support, B", that rigidly engages the stem A and stem 13, the piston in cylinder and its related one in C are connected, andmade to move in a common direction and in common time, From B a connecting rod,;B communicates with a crank, B on a crank shaft, C This connecting rod is attached to B and to crank 13, by any conventional means,

In cylinder A there is a piston. 0 from which a connecting rod, C transmits the motion of said piston to a crank. 1 Connecting rod C is fitted to pistonC by, a wrist pin shown at C Fig. 3, andto. the crank, C5, by means of a cap and bolts, as, shown. From the construction herein described it is evident that the pistons A and C will move together, but in opposite directions; and, further. that the same relative members in C will do likewise.

The operation of the engine is as follows: I As shown in Fig. 1, piston C is, at end of compression stroke, while piston A is in the same relative position, having compressed the volume of air in cylinder A into thecavity, A". Crank C is on a dead center and is about to begin its outstroke. At this pointa cam D, Fig. 2, lifts the stem of valve A This is done by the action of the cam surface on the roller D The large valve is seated on B, while the smaller diameter valve on the same stem (D uncovers the smaller seat. B The compressed charge in the cylinder A is thus brought in contact with a highly compressed mass: of air, the temperature of which is sufficient to ignite the fuel content of the compressed charge. Ignition results, and power is developed by piston C said power being By a passage through cylinder transmitted to, shaft C by the means already described. The piston A goes upward as piston moves downward. Valve ATis,.,1neanwhile, held on seat by the dwell on cam ,D', Figs., 2 and 4. ASA goes 1 approach each otherL By an operable valve,-

not' shown', an exhaust'port is opened and I valveseats" uncovered (seecylinder piston C pushes out the products of combustionthrough eithaustpassage D Dub ing 'this' int'erval cam l) allows the spring E yto draw backwalve A7, leavin both i Fig. The air underpiston A is forced through thecavity"A, passing on to cylinder A andout through exhaust port. A

thorough scavenging is thus effected. IAt

erid'ot smengi stroke cam-l) closes valve A, the smaller diameter seating on B 7 25 asshown'in Fig. 1.: On snctionstroke bothpietone draw in charges, A taking 'in air and piston C 7 an explosive charge from carbnreter, 'or' fuel supply.

The, ai to A to C ll'IfOLlgh an inlet portrF'fFig'. 3 con trolled by an o er ble valveynotl'shown; On compression? stroke, piston" C compresses .gas andair'iinto the combustion spaceojt cylinder A while piston A compresses the revionsly'intakenyairintd the cavity A".

, 1ytreasonxofthe relative volumes of cylinder A and cavity A, the degree of compres ysioniresults" in great increase ottemperature of the chargybf air iniA; On the beginning of next'outstroke cam D operates valve A, opening cavity' to the freshly compressed charge in, cylinder ,A :A complete cycle is thus established --aInd*is re--.

.peated in cylinder C. In'Fig. a position of cam at -time ofignition -is shown.

, Many modifications of the i' 'rovement'l have described are possible 'with'out departing from the idea of my invention.

WVhat I believeis new and ask to have proe '1. In an internalcomhustion engine, the

tested by Letters.f-l.atent lS- -L combination of power -cylinders, power pis: tons in Silld cylinders, compression cyl nders means fer-attaching said compression 'cyl-' inders'to said powercylinders, heads between saidpower cylinders and' said Corns" pressionlcylinders, cavities 1 in I said heads, valve seats flU'OpPOSlfG sides of said cavities, valve stems, sleeves, means for fastening said sleeves. to" saidcompression pistons,v

packing glands on said sleeves, independent valvesin said heads, inlet andoutlet means to said valves; a yoke, means for connecting said sleeves t'of aid yoke, means for connecting said sleeves to said compression pigs tons,"a'conn'ecting rod, a crank -'shaft',"connesting" means from said yoke to said 'crank shaft, and means for scavenging the .caviv ti in said head's, sulosta-nt-ially. as described. 25in an internalk c0mbust1on engine,

ders, compression pistons, independent valves in said heads, inletsjsand outlets to i said independent valves,;"oavities in said :heads, valves in said f'ca-viti'es, gconnecting vmeans betweenthe valves in said cavities,

;inlet and'outlet means to said valves, and

means for scavengingsaid cavities by the In testimony action of the compressioffpistons', snbstanr whereof his); my signature,-

3 ALVAH-L. POWELL. 

